Study

Year

Representativeness of the exposed cohort

Selection of the non-exposed cohort

Ascertainment of exposure

Demonstration of the absence of outcome of interest at the start of the study

Comparability (control for important factors) (maximum two stars)

Assessment of outcome

Follow-up adequate for outcomes

Adequacy of follow up

Total score

Tzamalis et al. 2020

2020

*

*

*

*

**

*

*

*

9